Medical device components

Abstract

Medical device components, such as tube-shaped catheter components, are disclosed. In some embodiments, a medical device component includes a region that includes a polyamide having a hoop stress ratio of at least about 1.25.

1. A component of a balloon catheter shaft, wherein the component of the shaft includes a region that comprises a polyamide having a hoop stress ratio of at least about 1.25, wherein the region of the component is tube-shaped. 
     
     
       2. The component of  claim 1 , wherein the component comprises a first layer and a second layer, the first layer having a different flexibility from the second layer. 
     
     
       3. The component of  claim 1 , wherein the hoop stress ratio of the polyamide is at least about 1.5. 
     
     
       4. The component of  claim 1 , wherein the polyamide has a tensile strength of at least about 21,000 psi. 
     
     
       5. The component of  claim 1 , wherein the polyamide has a hoop stress of at least about 3300 psi. 
     
     
       6. The component of  claim 1 , wherein the polyamide comprises a copolymer. 
     
     
       7. An elongate medical device comprising:
 an elongate catheter shaft including one or more tube-shaped catheter shaft components selected from the group consisting of a sheath, a hypotube, a midshaft, a distal outer tube, a distal inner tube, an outer tube, and an inner tube; 
 wherein one or more of the tube-shaped catheter shaft components include a region that comprises a polyamide and has a hoop stress ratio of at least about 1.25. 
 
     
     
       8. The elongate medical device of  claim 7 , further including a first inflatable balloon attached to the catheter shaft. 
     
     
       9. The elongate medical device of  claim 8 , wherein the tube-shaped portion comprises a first layer and a second layer, the first layer having a different flexibility from the second layer. 
     
     
       10. The elongate medical device of  claim 8 , wherein the hoop stress ratio of the polyamide is at least about 1.5. 
     
     
       11. The elongate medical device of  claim 8 , wherein the polyamide has a tensile strength of at least about 21,000 psi. 
     
     
       12. The elongate medical device of  claim 8 , wherein the polyamide has a hoop stress of at least about 3300 psi. 
     
     
       13. The elongate medical device of  claim 8 , wherein the polyamide comprises a copolymer. 
     
     
       14. A component of a catheter, comprising:
 an elongate shaft including a hypotube and a sheath disposed on the hypotube, wherein the elongate shaft includes a tube shaped region that comprises a polyamide having a hoop-stress ratio of at least about 1.25.